CN106851479A - A kind of audio playing apparatus and method - Google Patents
A kind of audio playing apparatus and method Download PDFInfo
- Publication number
- CN106851479A CN106851479A CN201710075740.5A CN201710075740A CN106851479A CN 106851479 A CN106851479 A CN 106851479A CN 201710075740 A CN201710075740 A CN 201710075740A CN 106851479 A CN106851479 A CN 106851479A
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- audio
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- signal
- conversion module
- video signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
Abstract
The invention provides a kind of audio playing apparatus and method, the device includes：USB, audio conversion module and audio playing module, the USB are connected with the audio conversion module, and the audio conversion module is connected with the audio playing module；When the USB receives the first digital audio and video signals of outer audio equipment input, first digital audio and video signals are exported to the audio conversion module, after first digital audio and video signals are converted to the first simulated audio signal by the audio conversion module, first simulated audio signal is exported to the audio playing module carries out audio broadcasting.Directly the digital audio and video signals that USB is transmitted are carried out D/A switch to realize audio transmission using audio conversion module, avoid the process of software processing signal conversion, so that audio transmission is not perplexed by time delay, the Digital Transmission process of audio signal is optimized.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of audio playing apparatus and method.
Background technology
With the new standard USB TYPE-C of USB (Universal Serial Bus, abbreviation USB) interface
Interface emerges, and this with ultra-thin, at a high speed, powerful power supply capacity supports positive anti-plug, integrates various functions (such as power supply, data
Transmission and video frequency output), and the new interface of the multifrequency nature such as backward compatibility receives more and more extensive concern.
At present, transmitting audio by USB TYPE-C interfaces has two ways：Digital Transmission and analogue transmission.Relative to mould
Intend transmission, the interference free performance of Digital Transmission is stronger.But Digital Transmission generally needs to increase controller realization in external equipment
Conversion between usb signal and integrated circuit built-in audio bus (Inter-IC Sound, abbreviation I2S) signal could pass through
USB TYPE-C interfaces realize the transmission of audio.Because the conversion of software processing signal needs 200ms or so times, audio can be caused
There is latency issue in transmission, causes the experience that user is bad.It can be seen that, existing utilization digital transmission mode passes through general serial
EBI transmission audio can produce the situation of time delay.
The content of the invention
A kind of audio playing apparatus and transmission method are the embodiment of the invention provides, it is logical using digital transmission mode to solve
Cross the technical problem that time delay is caused in USB transmission audio process.
In a first aspect, a kind of audio playing apparatus are the embodiment of the invention provides, including：USB, sound
Frequency modular converter and audio playing module, the USB are connected with the audio conversion module, the audio
Modular converter is connected with the audio playing module；
When the USB receives the first digital audio and video signals of outer audio equipment input, by institute
State the first digital audio and video signals to export to the audio conversion module, the audio conversion module believes first DAB
After number being converted to the first simulated audio signal, first simulated audio signal is exported to the audio playing module carries out sound
Frequency is played.
Second aspect, the embodiment of the present invention also provides a kind of audio frequency playing method, including：
Receive the first digital audio and video signals of outer audio equipment output；
First digital audio and video signals are carried out being converted to the first simulated audio signal；
First simulated audio signal is played out.
So, a kind of audio playing apparatus provided in an embodiment of the present invention and method, the audio playing apparatus include：It is general
Serial bus interface, audio conversion module and audio playing module, the USB and the audio modulus of conversion
Block is connected, and the audio conversion module is connected with the audio playing module；Outside the USB is received
During the first digital audio and video signals of portion's audio frequency apparatus input, first digital audio and video signals are exported to the audio modulus of conversion
Block, after first digital audio and video signals are converted to the first simulated audio signal by the audio conversion module, by described first
Simulated audio signal is exported to the audio playing module and carries out audio broadcasting.By using audio conversion module directly to general
The digital audio and video signals of serial bus interface transmission carry out D/A switch to realize audio transmission, it is to avoid software processing conversion
The process of data signal so that carry out audio transmission using digital form and do not perplexed by time delay, optimizes transmission line design, section
Transmission cost is saved.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to needed for embodiment of the present invention description
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention,
For those of ordinary skill in the art, without having to pay creative labor, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is a kind of structural representation of audio playing apparatus provided in an embodiment of the present invention；
Fig. 2 is the structural representation of another audio playing apparatus provided in an embodiment of the present invention；
Fig. 3 is the pin assignment schematic diagram of USB TYPE-C interfaces provided in an embodiment of the present invention；
Fig. 4 is the structural representation of another audio playing apparatus provided in an embodiment of the present invention；
Fig. 5 is the structural representation of another audio playing apparatus provided in an embodiment of the present invention；
Fig. 6 is the structural representation of another audio playing apparatus provided in an embodiment of the present invention；
Fig. 7 is a kind of audio frequency playing method flow chart provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on this hair
Embodiment in bright, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
In a first aspect, referring to Fig. 1, the present invention implements a kind of audio playing apparatus 100 for providing, including：General serial is total
Line interface 101, audio conversion module 102 and audio playing module 103, the USB 101 and the audio
Modular converter 102 is connected, and the audio conversion module 102 is connected with the audio playing module 103；
When the USB 101 receives the first digital audio and video signals of outer audio equipment input,
First digital audio and video signals are exported to the audio conversion module 102, the audio conversion module 102 is by described first
After digital audio and video signals are converted to the first simulated audio signal, first simulated audio signal are exported to the audio and is played
Module 103 carries out audio broadcasting.
In the present embodiment, outer audio equipment can be the equipment of any use USB connection, for example,
Mobile phone, panel computer (Tablet Personal Computer), kneetop computer (Laptop Computer), individual digital
Assistant (Personal Digital Assistant, abbreviation PDA), mobile Internet access device (Mobile Internet Device,
Abbreviation MID) or Wearable device (Wearable Device) etc..
In embodiments of the present invention, USB 101 uses USB TYPE-C interfaces.Due to USB TYPE-C
Interface can realize it is positive and negative insert, it is easy to use, and can be carried out to audio playing apparatus with compatibility using USB TYPE-C interfaces
Power supply, the function such as transmission order and control audio transmission, there is also larger improvement in terms of tonequality, can improve Consumer's Experience.
When the first digital audio and video signals that USB TYPE-C interfaces to outer audio equipment are input into, by first DAB letter
Number sending to audio conversion module 102 carries out D/A switch.In embodiments of the present invention, audio conversion module 102 is coding and decoding
Device Codec, is effectively reduced the space that data signal storage takes, and the data of coder Codec can be completed using hardware
Conversion, saves central processor CPU resource, relative to being changed using software data processing in the prior art, in the absence of time delay
Problem, substantially increases the efficiency of audio transmission.
A kind of audio playing apparatus are the embodiment of the invention provides, including：USB, audio conversion module
And audio playing module, the USB is connected with the audio conversion module, the audio conversion module with
The audio playing module connection；When the USB receives the first digital sound of outer audio equipment input
During frequency signal, first digital audio and video signals are exported to the audio conversion module, the audio conversion module will be described
After first digital audio and video signals are converted to the first simulated audio signal, first simulated audio signal is exported to the audio
Playing module carries out audio broadcasting.The digital audio and video signals directly transmitted to USB using audio conversion module
Carry out D/A switch to realize audio transmission, it is to avoid the process of software processing conversion digital signal so that use digital form
Carry out audio transmission not perplexed by time delay, optimize transmission line design, save transmission cost.
Second aspect, the embodiment of the present invention additionally provides a kind of audio playing apparatus, as shown in Fig. 2 including：
USB 201, audio conversion module 202, audio playing module 203 and microphone module 204, it is described
USB 201 is connected with the audio conversion module 202, and the audio conversion module 202 is broadcast with the audio
Amplification module 203 is connected, and the microphone module 204 is connected with the audio conversion module 202；
When the USB 201 receives the first digital audio and video signals of outer audio equipment input,
First digital audio and video signals are exported to the audio conversion module 202, the audio conversion module 202 is by described first
After digital audio and video signals are converted to the first simulated audio signal, first simulated audio signal are exported to the audio and is played
Module 203 carries out audio broadcasting；
When the microphone module 204 receives voice messaging, the voice messaging is converted into the second analogue audio frequency letter
Number, and second simulated audio signal being exported to the audio conversion module 202, the audio conversion module 202 is by institute
State after the second simulated audio signal is converted to the second digital audio and video signals, second digital audio and video signals are exported to described logical
With serial bus interface 201.
Microphone module 204 is increased in embodiments of the present invention, and directly using the D/A turn of audio conversion module 202
Treatment is changed while realizing the audio input and output function of the audio playing apparatus, the performance of audio playing apparatus is extended,
Also improve ease of use.
It should be understood that the outer audio equipment in embodiment can be the connection of any use USB
Equipment, for example, mobile phone, panel computer (Tablet Personal Computer), kneetop computer (Laptop
Computer), personal digital assistant (Personal Digital Assistant, abbreviation PDA), mobile Internet access device
(Mobile Internet Device, abbreviation MID) or Wearable device (Wearable Device) etc..
As shown in figure 4, outer audio equipment includes application processor and digital signal processor (Digital Signal
Processor, abbreviation DSP), application processor and DSP are provided with a variety of pins and are believed with exporting digital audio and video signals and USB
Number.In embodiments of the present invention, so that digital audio and video signals are I2S signals as an example, application processor and DSP include BCLK pins,
LRCLK pins and D0/D1 pins, wherein, BCLK pins are used to export bit clock BCLK data, and LRCLK pins are used to export
Synchronised clock LRCLK data, D0/D1 pins are used for the input/output of voice data.In addition, application processor and DSP also include
D+ pins and D- pins, for exporting usb signal.
To realize the switching of digital audio and video signals and usb signal, outer audio equipment also includes either-or switch, in this hair
In bright embodiment, by taking I2S signals as an example, D+ pins are connected with a ends of either-or switch, the b ends of D- pins and either-or switch
Connection, BCLK pins are connected with the a' ends of either-or switch, LRCLK pins are connected with either-or switch b' ends.When application is processed
When device and DSP output I2S signals, either-or switch is switched to a', b' end；When application processor and DSP output usb signals,
Then either-or switch is switched to a, b end.
Optionally, first digital audio and video signals are the first integrated circuit built-in audio bus I2S signals.
It should be understood that the first digital audio and video signals can be the audio signal of any digital form, implement in the present invention
In example, audio transmission is carried out from integrated circuit built-in audio bus I2S signals.I2S signals are along independent wire transmission clock
With the design of data-signal, by mask data and clock signal, it is to avoid the distortion that the time difference induces, output can be effectively lifted
The quality of data.
Optionally, the USB includes Dp signal transmissions pin, Dn signal transmissions pin and first
Sideband uses pin, the Dp signal transmissions pin, Dn signal transmissions pin and the first sideband using pin respectively with it is described
Audio conversion module is connected, the bit clock BCLK data of the I2S signals that the Dp signal transmissions pin will be received
The synchronised clock of the I2S signals that output will be received to the audio conversion module, the Dn signal transmissions pin
The I2S signals that LRCLK data outputs will be received to the audio conversion module, first sideband using pin
Voice data export to the audio conversion module.
Fig. 3 is the pin assignment schematic diagram of USB TYPE-C interfaces in the embodiment of the present invention, as shown in figure 3, USB TYPE-
C interface has 24 pins, and pin is essentially the arrangement of crossed-symmetrical formula, including Dp signal transmissions pin, Dn signal transmissions pin,
And sideband uses pin SBU1 and SBU2.
I2S signals generally include three signal lines：Bit clock BCLK, that is, correspond to each data of DAB, BCLK
There is 1 pulse；Synchronised clock LRCLK, for the data of switching right and left sound channel；And data input/output, enter for transmitting two
The voice data of complement representation processed.
As shown in figure 4, Dp signal transmissions pin, Dn signal transmissions pin and side in USB 101
Band is connected with the audio conversion module 202 respectively using pin SBU1,2Dp signal transmissions pin will receive described first
The bit clock BCLK data outputs of I2S signals to the audio conversion module 202, described in Dn signal transmissions pin will be received
The synchronised clock LRCLK data outputs of the first I2S signals to the audio conversion module 202, sideband will be connect using pin SBU1
The voice data of the I2S signals for receiving is exported to the audio conversion module 202.
Optionally, second digital audio and video signals are the 2nd I2S signals.
It should be understood that the first digital audio and video signals can be the audio signal of any digital form, implement in the present invention
In example, audio transmission is carried out from integrated circuit built-in audio bus I2S signals.I2S signals are along independent wire transmission clock
With the design of data-signal, by mask data and clock signal, it is to avoid the distortion that the time difference induces, output can be effectively lifted
The quality of data.
Optionally, the second sideband of the USB is connected using pin with the audio conversion module,
The voice data of the 2nd I2S signals that second sideband will be received using pin is exported to the audio modulus of conversion
Block.
As shown in figure 4, the Intermediate Side Band of USB 101 uses pin SBU2 and the audio conversion module 202
Connection, the voice data of the 2nd I2S signals that sideband will be received using pin SBU2 is exported to the audio modulus of conversion
Block 202.
Optionally, as shown in figure 5, the audio playing apparatus 200 also include：First signal amplification module 205, described
The input of one signal amplification module 205 is connected with the audio conversion module 202, the first signal amplification module 205
Output end and the audio playing module 203 are connected, described first signal amplification module, 205 pairs of audio conversion modules 202
The simulated audio signal of output is amplified treatment, and is exported to the audio playing module 203.
Specifically, the power that the first signal amplification module 205 converts the audio into the simulated audio signal of the output of module 202 enters
Row amplifies, to drive 203 pairs of simulated audio signals of audio playing module to play out.
Optionally, as shown in fig. 6, the audio playing apparatus 200 also include：Secondary signal amplification module 206, described
The input of binary signal amplification module 206 is connected with the microphone module 204, the output of the secondary signal amplification module 206
End and the audio conversion module 202 are connected, 206 pairs of moulds of the output of the microphone module 204 of the secondary signal amplification module
Intend audio signal and be amplified treatment, and exported to the audio conversion module 202.
Specifically, the voltage of simulated audio signal that secondary signal amplification module 206 exports microphone module 204 is put
Greatly, driving 202 pairs of simulated audio signals of audio conversion module to carry out D/A switch.
A kind of audio playing apparatus are the embodiment of the invention provides, including：USB, audio modulus of conversion
Block, audio playing module and microphone module, the USB are connected with the audio conversion module, the audio
Modular converter is connected with the audio playing module, and the microphone module is connected with the audio conversion module；When described general
When serial bus interface receives the first digital audio and video signals of outer audio equipment input, by first digital audio and video signals
To the audio conversion module, first digital audio and video signals are converted to the first analog audio by the audio conversion module for output
After frequency signal, first simulated audio signal is exported to the audio playing module carries out audio broadcasting.When the microphone
When module receives voice messaging, the voice messaging is converted into the second simulated audio signal, and by second analog audio
Second simulated audio signal is converted to second by frequency signal output to the audio conversion module, the audio conversion module
After digital audio and video signals, second digital audio and video signals are exported to the USB.Using audio conversion module
Directly digital audio and video signals/simulated audio signal for receiving is carried out D/A switch to realize audio transmission, it is to avoid software
Process the process of conversion digital signal so that audio transmission is carried out using digital form and is not perplexed by time delay, optimize transmission line
Road is designed, and saves transmission cost.
The third aspect, the embodiment of the invention provides a kind of audio frequency playing method, referring to Fig. 7, comprise the following steps：
Step 701, the first digital audio and video signals for receiving outer audio equipment output；
Step 702, first digital audio and video signals are carried out being converted to the first simulated audio signal；
Step 703, first simulated audio signal is played out.
Optionally, the audio frequency playing method also includes：
Receive voice messaging and the voice messaging is converted into the second simulated audio signal；
Second simulated audio signal is converted into the second digital audio and video signals；
Second digital audio and video signals are exported to the outer audio equipment.
Optionally, first digital audio and video signals are the first integrated circuit built-in audio bus I2S signals.
Optionally, second digital audio and video signals are the 2nd I2S signals.
Above-mentioned audio frequency playing method can be as shown in Fig. 1, Fig. 2, Fig. 4, Fig. 5 and Fig. 6 any audio playing apparatus realize,
Its specific embodiment may refer to the implementation method of above-mentioned frequency transmitting device, and here is omitted.
A kind of audio frequency playing method provided in an embodiment of the present invention, including：Receive the first number of outer audio equipment output
Word audio signal；First digital audio and video signals are carried out being converted to the first simulated audio signal；To first analog audio
Frequency signal is played out.Directly the digital audio and video signals that USB is transmitted are entered by using audio conversion module
Row D/A switch to be realizing audio transmission, it is to avoid the process of software processing conversion digital signal so that entered using digital form
Row audio transmission is not perplexed by time delay, optimizes transmission line design, saves transmission cost.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (12)
1. a kind of audio playing apparatus, it is characterised in that including：USB, audio conversion module and audio are broadcast
Amplification module, the USB is connected with the audio conversion module, the audio conversion module and the audio
Playing module is connected；
When the USB receives the first digital audio and video signals of outer audio equipment input, by described the
One digital audio and video signals are exported to the audio conversion module, and the audio conversion module turns first digital audio and video signals
After being changed to the first simulated audio signal, first simulated audio signal is exported to carry out audio and broadcasts to the audio playing module
Put.
2. device according to claim 1, it is characterised in that the audio playing apparatus also include microphone module, described
Microphone module is connected with the audio conversion module, when the microphone module receives voice messaging, by the voice messaging
The second simulated audio signal is converted into, and second simulated audio signal is exported to the audio conversion module, the sound
After second simulated audio signal is converted to the second digital audio and video signals by frequency modular converter, by second DAB letter
Number output is to the USB.
3. device according to claim 1, it is characterised in that first digital audio and video signals are in the first integrated circuit
Put audio-frequency bus I2S signals.
4. device according to claim 3, it is characterised in that the USB draws including Dp signal transmissions
Pin, Dn signal transmissions pin and the first sideband use pin, the Dp signal transmissions pin, Dn signal transmissions pin and
One sideband is connected with the audio conversion module respectively using pin, the Dp signal transmissions pin will receive described first
The institute that the bit clock BCLK data outputs of I2S signals will be received to the audio conversion module, the Dn signal transmissions pin
The synchronised clock LRCLK data outputs of an I2S signals are stated to the audio conversion module, first sideband will using pin
The voice data of the I2S signals for receiving is exported to the audio conversion module.
5. device according to claim 2, it is characterised in that second digital audio and video signals are the 2nd I2S signals.
6. device according to claim 5, it is characterised in that the second sideband of the USB is using drawing
Pin is connected with the audio conversion module, the audio of the 2nd I2S signals that second sideband will be received using pin
Data output is to the audio conversion module.
7. according to any described device of claim 1, it is characterised in that described device also includes：
First signal amplification module, the input of the first signal amplification module is connected with the audio conversion module, described
The output end of the first signal amplification module and the audio playing module are connected, and the first signal amplification module is to the audio
The simulated audio signal of modular converter output is amplified treatment, and is exported to the audio playing module.
8. device according to claim 2, it is characterised in that described device also includes：
Secondary signal amplification module, the input of the secondary signal amplification module is connected with the microphone module, and described second
The output end of signal amplification module and the audio conversion module are connected, and the secondary signal amplification module is to the microphone module
The simulated audio signal of output is amplified treatment, and is exported to the audio conversion module.
9. a kind of audio frequency playing method, it is characterised in that including：
Receive the first digital audio and video signals of outer audio equipment output；
First digital audio and video signals are carried out being converted to the first simulated audio signal；
First simulated audio signal is played out.
10. method according to claim 9, it is characterised in that methods described also includes：
Receive voice messaging and the voice messaging is converted into the second simulated audio signal；
Second simulated audio signal is converted into the second digital audio and video signals；
Second digital audio and video signals are exported to the outer audio equipment.
11. methods according to claim 9, it is characterised in that first digital audio and video signals are an I2S signals.
12. methods according to claim 10, it is characterised in that second digital audio and video signals are the 2nd I2S signals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710075740.5A CN106851479A (en) | 2017-02-13 | 2017-02-13 | A kind of audio playing apparatus and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710075740.5A CN106851479A (en) | 2017-02-13 | 2017-02-13 | A kind of audio playing apparatus and method |
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| CN201710075740.5A Pending CN106851479A (en) | 2017-02-13 | 2017-02-13 | A kind of audio playing apparatus and method |
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| CN107273087A (en) * | 2017-06-20 | 2017-10-20 | 珠海市魅族科技有限公司 | A kind of audio input/output system based on Type C interface, device and method |
| CN107329731A (en) * | 2017-07-18 | 2017-11-07 | 深圳暴风统帅科技有限公司 | A kind of I2S signal transmission systems |
| CN109040777A (en) * | 2018-08-17 | 2018-12-18 | 江苏华腾智能科技有限公司 | A kind of Internet of Things broadcast audio transmission delay minishing method |
| CN113141561A (en) * | 2020-01-19 | 2021-07-20 | 神讯电脑(昆山)有限公司 | Device for realizing long-distance audio signal playing |
| CN113301494A (en) * | 2021-05-25 | 2021-08-24 | 湖北亿咖通科技有限公司 | Audio playing system, control equipment and power amplifier equipment |
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| CN113301494A (en) * | 2021-05-25 | 2021-08-24 | 湖北亿咖通科技有限公司 | Audio playing system, control equipment and power amplifier equipment |
| CN113301494B (en) * | 2021-05-25 | 2022-09-02 | 亿咖通(湖北)技术有限公司 | Audio playing system, control equipment and power amplifier equipment |
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